Hi gsco, You add nutrients every time you add water unless you are using a more advanced method of monitoring nutrient solution concentration (ex: a TDS meter). With the "every time you add water" method, it is important to completely replace your nutrient solution every 30-60 days. -- [please mark this post as "Correct Answer" and/or "Helpful" when appropriate] -- Happy Growing! -JoeD towergarden level2concepts tgtech TG Tech
Great very helpful, thank you. As a follow up question, how low to you let the water go before refilling then?
From Logan Nickleson's article:
How to Ensure Your Indoor Tower Garden Is a Success
He states "You’ll likely find that your indoor Tower Garden needs refilling every 10–20 days"
It seems that a water level decrease is what would cause the water to need refilling and thus the variation in days.
What is the trigger for refill? Is it when the res. would need 5 gallons to bring it back full ? 10 gallons?
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Hi gsco, Do not confuse the task of nutrient solution refilling (I prefer the term topping-off) with the separate task of completely replacing your nutrient solution every 30-60 days. The quote you cited from Logan's article is referring to the approximate frequency of topping-off, not complete replacement. Topping-off frequency depends on many variables... such as type and size of plants, temperature, humidity, season, light levels, proper and consistent system maintenance, etc.. Personally, I wait until the nutrient solution level in the tub is down about 3/4 full (~5 gallons) before topping-off. I never allow the tub nutrient solution level to drop below 1/2 full (there are several reasons why this is important). You will find this and other helpful TG Do's and Don'ts in this document: Tower Garden Fundamentals.
Great information again. I'm due for a complete replacement of nutrient solution this weekend.
I'll aim for the ~5 gallon top-off intervals, with either 1/2 or full strength nutrient mixtures.
Thanks for your help.